Have you found a load that works yet.. I have been working on a load for the 6.5x284 I built on a savage action.. I have tried H-4831sc,h4350,Retumbo and H1000.. All gave good accuracy but I got more velocity with Rtumbo and H1000.... H4350 was the slowest I don't have a crono so have everything plug into my ballistic calc and validate velocity from my dope.. It works for what I have to work with.. The load I am using right now is 55gr of H1000 with a F215 and .20 off the lands... A really smoking load is 58.5 gr of Retumbo but was getting ejector marks but man did that hit the steel hard and was accurate... Going to play with it and back it down some and see sometime what it will continue to do, but the H1000 load worked for my uncle a few days ago he used it to get his first ever pronghorn.. 386 yards one shot spun a circle and ran maybe 50 yards and slid to a stop a 2 inch exit hole and his lungs were mush...